毕业设计（论文）-发动机曲轴连杆机构仿真及有限元分析设计-adams

曲轴连杆活塞组件虚拟样机的建立学 院 名 称：机械工程学院专 业 班 级： 机械设计制造及其自动化 0501 班学 生 姓 名：号：指 导 教 师：学2009 年 6 月全套图纸加扣 3012250582 江 苏 大 学 学 士 学 位 论 文摘 要柴油机的气缸、活塞、连杆、曲轴以及主轴承组成一个曲柄连杆机构。柴油机通过曲柄连杆机构，将活塞的往复运动转换为曲轴的回转运动，使气缸内燃油燃烧所产生的热能转变为曲轴输出的机械功。可见，曲柄连杆机构是柴油机重要的传力机构。对其运动和受力情况进行分析和研究，是十分必要的。这种分析研究既是解决柴油机的平衡、振动和总体设计等课题的基础，也是对其主要零部件在强度、刚度、磨损等方面进行计算和校验时的依据。本文在曲柄连杆机构理论分析的基础上，利用多体动力学理论，三维造型软件 Pro/E及动力学分析软件 ADAMS 对内燃机曲柄连杆机构的动力学问题进行了虚拟样机仿真分析。并以 CT484Q 柴油机为研究对象，在 Pro/E 中建立 CT484 柴油机曲柄连杆机构的虚拟样机模型，导入 ADAMS 中进行动力学分析，绘制出虚拟样机模型中各连接位置处受力仿真结果曲线。通过本文的研究，展示了一种简捷、高效的机械设计分析手段，对今后同类型的研究乃至更大规模的仿真分析积累了一些经验。本文的研究也可以为今后内燃机机构的造型、优化设计提供参考依据。关键词：内燃机，曲柄连杆机构，ADAMS，虚拟样机，仿真1 江 苏 大 学 学 士 学 位 论 文AbstractThe Cylinder, piston, connecting rod, crankshaft and main bearings of diesel engineCompose of a crank-connecting rod mechanism. Through the crank-connecting rod mechanism,Diesel engine convert the piston reciprocating motion to the rotary movement of the crankshaft,and make the cylinder generated by fuel combustion energy into mechanical work output of thecrankshaft. This shows that diesel engine crank linkage is an important body for transmissionforce. It is necessary to analysis and research its movement and force. This analysis is thefoundation to solve the balance of diesel engine, vibration and overall design, It is the basis forvalidate and calculate the strength, stiffness, wear, etc.In this paper, based on the theoretical analysis of crank-connecting rod mechanism, use ofmulti-body dynamics theory, and use the three-dimensional modeling software, Pro/ E and thedynamic analysis software ADAMS to carry out crank and connecting rod for internalcombustion engine body dynamics simulation of a virtual prototype simulation. And studyCT484Q Diesel Engine, established linkage of the virtual prototype of diesel engine model InPro/ E, then do dynamic analysis in ADAMS and draw the connection position of the powercurve for the simulation result.Through this paper, the study demonstrated a simple and efficient means of mechanicaldesign and analysis for future research as well as the same type of simulation analysis andaccumulate some experience. The study of this paper can provide reference for the modeling andoptimal design.Key words: Internal Combustion Engine, Crank-connecting rod mechanism, ADAMS, VirtualPrototyping2 江 苏 大 学 学 士 学 位 论 文目录第一章 绪论······························································11.1 研究的意义···························································11.2 内燃机曲柄连杆机构的工作特点以及难点································11.3 国内外研究及手段·····················································21.3.1计算机辅助设计（CAD）··········································21.3.2 多体动力学分析（MBS）··········································21.3.3 有限元分析·····················································31.3.4优化设计理论···················································31.4 主要研究内容和方法···················································4第二章 曲柄连杆机构的动力学理论分析··································52.1 内燃机工作过程分析···················································52.1.1压缩始点气体状态···············································52.1.2压缩终点气体状态··············································62.1.3燃烧过程及燃烧终点气体状态·····································62.1.4膨胀终点气体状态···············································72.2 曲柄连杆机构的运动分析··············································72.3曲柄连杆机构的动力学分析·············································92.3.1曲柄连杆机构的质量换算·········································92.3.2曲柄连杆机构的惯性力和惯性力矩································102.3.3曲柄连杆机构的动力学分析······································113 江 苏 大 学 学 士 学 位 论 文2.4 内燃机工作过程计算·················································11第三章 曲轴连杆活塞组件的虚拟样机····································1 53.1Pro/E 系统的建模原理及其特点········································153.1.1参数化设计····················································153.1.2 特征建模的基本思想············································163.1.3全相关的单一数据库············································163.2 曲柄、连杆、活塞组件几何模型的建立以及装配··························163.2.1活塞组件的建模················································163.2.2 连杆组建的建模················································193.2.3曲轴组件的建模················································213.2.4曲轴连杆活塞组件的总装配······································23第四章 曲柄连杆机构的运动学和动力学分析······························2 24.1ADAMS简介及其基本原理·············································254.1.1 运动学和动力学基本概念········································264.1.2 ADAMS中多刚体动力写方程的建立································284.2ADAMS 中的运动学和动力学分析······································294.2.1 曲柄连杆机构刚体模型的转化和输入······························304.2.2 曲轴轴系多刚体动力学仿真分析······························